Merge pull request #1029 from Stephenzho/develop

[RIP-9] Update Deployment.md in docs/en

docs/en/Deployment.md

@@ -4,7 +4,7 @@
 
 ### 1 Single Master mode
 
-This is the simplest, but also the riskiest, mode that makes the entire service unavailable once the broker restarts or goes down. Production environments are not recommended, but can be used for local testing and development. Here are the steps to build.
+This is the simplest but also the riskiest mode, that makes the entire service unavailable once the broker restarts or goes down. Production environments are not recommended, but can be used for local testing and development. Here are the steps to build.
 
 **1）Start NameServer**